Adding source code modification restrictions

doc/sphinx/02_amg/amg.rst

@@ -36,6 +36,15 @@ Since in time dependent problems the AMG preconditioner might be used for severa
 The total FOM is evaluated as follows:   FOM = NNZ / (Setup_time + k * Solve_time).
 The parameter k is set to 1 in Problem 1 and to 3 in Problem 2.
 
+Source code modifications
+==========================
+
+Please see :ref:`_GlobalRunRules` for general guidance on source code modifications.  For AMG2023, we define the following restrictions on source code modifications:
+
+* AMG2023 uses Hypre as the solver library, available at https://github.com/hypre-space/hypre .  While source code changes to Hypre can be proposed, Hypre in AMG2023 may not be replaced with any other library.
+
+* Solver parameters should remain unchanged (smoothers, coarsening, etc.).  AMG2023 uses the default Hypre parameters appropriate for each platform.
+
 Building
 ========
 
@@ -139,6 +148,10 @@ It specifies the MPI process topology on which to run, requiring a total of  <Px
 
 The '-n' option allows one to specify the local problem size per MPI process, leading to a global problem size of <Px>*<nx> x <Py>*<ny> x <Pz>*<nz>.
 
+Validation
+==========
+
+The validation criteria for AMG2023 is defined as the convergence criteria for the benchmark.
 
 Example Scalability Results 
 ===========================